New Microsoft Products and Services Agreement Licensing Manual; probably the best, no-frills overview of the new MPSA, so worth a read. If you know your Select Plus licensing, start with that in mind as you read about Purchasing Accounts (affiliates), Price Levels (as Select Plus), Points (all Online Services at 1 point across Applications or Servers pool), and Price Level Adjustments (as Select Plus). Significant changes include the all-powerful Microsoft Volume Licensing Center that allows the usual licence management but adds ordering and allocation of Online Services too.
